[mpich-discuss] Sockets not working? Can't be true!

Kenneth Raffenetti raffenet at mcs.anl.gov
Tue Jun 5 10:36:32 CDT 2018


Hi Alexander,

A fix for this was included in version 3.2.1. Let us know if you still 
see an issue after updating.

Ken

On 05/23/2018 06:32 AM, Alexander Supalov wrote:
> Hi everybody,
> 
> I made a funny observation using a simple ping-pong MPI program on my 
> local network setup. Intranode runs are OK. Internode runs hang over 
> ch3:sock and fail or hang over nemesis, depending on OS version. 
> Standard ping works fine internode on both sides, and so do my own 
> socket-based programs. Any idea what this might be?
> 
> Nemesis diagnostics under Ubuntu 16.04 LTS:
> 
> c -f mpi.hosts -n 2 $PWD/pingpong
> Assertion failed in file 
> src/mpid/ch3/channels/nemesis/netmod/tcp/socksm.c at line 597: 
> hdr.datalen != 0
> internal ABORT - process 1
> 
> Host list:
> 
> 192.168.178.31
> 192.168.178.32
> 
> Platform:
> 
> Intel, Ubuntu 16.04 LTS on one side, Ubuntu 14.04 LTS on the other, 
> MPICH-3.2 on both, 100-Mbit Ethernet in between.
> 
> Best regards.
> 
> Alexander
> 
> 
> 
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